You know what the fine should be like? Giving its post-paid customers bill rebates based on a percentage of downtime in the month, multiplied by the post-paid customer's base subscription fee.
Example:
- 6 hours down time
- 720 hours in a 30-day month
Percentage downtime = 0.833%
Singtel's Flexi Lite base subscription = $39.90 monthly
Rebate amount = $0.33
Assuming SingTel has at least 1,000,000 post-paid smartphone subscribers (who use at least the basic smartphone plan), the fine for SingTel (or any telco for that matter) will be at least $330,000 for the 6 hour down time. But of course many people use the higher tier plans as well, so that makes the rebate/fine paid out bigger. And if we include post-paid non-smartphone users, I'm pretty sure the rebate/fine will be more than what they are currently fined for.
And what's more, this makes it equitable for inconvenienced stakeholders during the service disruption.